|Table of Contents|

The Effects of Enhance UV-B Radiation on the Content Variation of UV-absorbing Compouds and Adjusting Osmotic Substances of Lespedeza davurica(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年05期
Page:
13-17
Research Field:
Publishing date:

Info

Title:
The Effects of Enhance UV-B Radiation on the Content Variation of UV-absorbing Compouds and Adjusting Osmotic Substances of Lespedeza davurica
Author(s):
ZHU Jian-guo; HAO Wen-fang; ZHAO Jie; WANG Long-fei
College of Life Science，Northwest Agricultural and Forestry University，Yangling，Shaanxi 712100
Keywords:
Lespedeza davurica; enhanced UV-B radiation; UV-absorbing compound; adjusting osmotic substances
PACS:
Q 945
DOI:
-
Abstract:
Taking pot cultivation  Lespedeza davurica(Laxm.) Schindl as test material,the effects of enhanced UV-B radiations（0，1.944，3.002 kJ?m-2?d-1）on the content variation of UV-absorbing compounds and adjusting osmotic substances in the leaves were studied.The results showed that under the enhanced UV-B radiation，the contents of flavonoid，total hydroxybenzene，anthocyanin and the activity of phenylalanine ammonia-lyase increased at first and then decreased，and mostly they were significantly higher than that of the control(P<0.05).Also due to different doses of UV-B radiation，the effects were slightly different.The increase extent(in the early stage of UV-B radiation) of the content of UV-absorbing compounds(exceptfor anthocyanins)and the activity of phenylalanine ammonia-lyase under 3.002 kJ?m-2?d-1UV-B radiation are significantly larger than that of 1.944 kJ?m-2?d-1UV-B radiation(P<0.05).The content of soluble protein decreased significantly under the enhanced UV-B radiation(P<0.01)，and decreased with the increasing of UV-B radiation.Only on the sixth day and under 1.944 kJ?m-2?d-1UV-B radiation the content of free proline was significantly higher than that of the control(P<0.05)，which was not found in the the rest cases.These results implied that the enhanced UV-B radiation induced the synthesis of the UV-absorbing compounds in the leaves of Lespedeza davurica，but inhibited the synthesis of the adjusting osmotic substances especially soluble protein.

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Last Update: 2014-08-27